Cut-off device



Patented Feb. 2, 1932 warren era-res mane ra'rsnr ea-rice LLOYD F.SCHRADER, OF RICHMOND HILL, AND FRED P. HART, OF WHITESTONE, NEW

YORK, ASSIGNOBS, BY LIESNE ASSIGNMENTS, T0 SEMET-SOLVAY ENG-INEEBINGOOR-FORATION, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK GUT-OFF DEVICEApplication filed June 23,

The invention provides an improved de vice for shutting 05 gas,especially applicable between the gas o'fi-take pipe and the collectingmain of a coke oven battery.

The single figure of the drawing represents a vertical section of oneembodiment of the invention. a

The gases from the distillation ovens o-r carbonized chambers passupward through a pipe 1 with a cap 2 at the top. A downwardly inclineddischarge pipe 3 leads out of the top of the riser 1 and carries at thetop a spray pipe 4 which introduces cooling liquor into the gas. Thepipe 3 is connected at its lower end to an extension 5 which forms acasing or pocket for a liquor seal and drainage valve. The end wall 6 ofthis casing abuts against the side of the collecting main 7 into whichthe gas is to be passed, the casing being fastened to the main by meansof a flange 8.

In the upper part of the end wall 6 there is an opening 9 registeringwith an opening 10 in the main. At an intermediate point within thecasing there is a downward projection from the upper wall in the form ofa partition or plate 11 extending across the casing and downward to alevel below the openings 9 and 10. The liquor from the spray willaccumulate in the bottom of the casing 5 and rise to the level indicatedat 12, after which it will overflow through the opening 9 withoutdisturbing this level, thus maintaining a seal to cut off the passage ofgas.

In the lower part of the casing 5 there is a tubular passage 13communicating with the main through an opening 14 and adapted tocommunicate through a port 15 with the bottom of the casing. The port 15is opened or closed by means or a drainage valve 16 operated by a stem17 extending through the top of the casing and through a stufiing box 184 carried thereon.

While the valve 16 is held open, the liquor will drain out through thepassage 13 into the main, leaving the larger passage clear through theopenings 9 and 10 for the gas to flow freely. When the gas is to be cutoil the valve 16 is closed and the liquor will ac- 1928. Serial No.287,764..

cumulate and form a seal to prevent the'gas from passing.

The passageway 13 has at its outer end a screw plug 19, the removal ofwhich gives access for cleaning out any accumulated sediment from theliquor. r a

It will be noted that plug 19 is accessible from the outside of thecasing and consequently ready access to the passage 13 may be had fromthe exterior of the casing for cleaning purposes.

Various other modifications may be made by those skilled in the artwithout departing from the invention as defined in the following claims:7

1. A cut-01f for riser to a collecting main of a coke oven-batterycomprising a casing having a lower end wall with an opening provided inits upper portion registering with an opening in the main and having aportion closing the upper part of said casing at a point spaced fromsaid opening in said casing and projecting downwardly toa level belowthe bottom of said opening in said casing so as to maintain a liquidseal which prevents the passage of gas, said casing being provided witha separate passage communicating with another opening in the main andsaid separate passage being provided with a valve portthrough which theliquid can be drained off. a

2. A cut-ofi' for distillation gases from a riser to a collecting mainof a coke oven battery comprising a casing having a lower end wallprovided with'an' opening in its 'upper portion registering withanopening provided in the main and having a portionclosing thedistillation gases from a r upper part of said casing at a point spacedfrom said opening in said casing and projecting from the upper wall downto a level be,

low the bottom of said opening in said casing said separate passagebeing provided witha valve port through which the liquid can be drainedofl", said separate passage being accessible from the outside of thecasing for clean-- ing.

I we

her to a collecting main comprising a riser 3. Apparatus of thetypedescribed which comprises a main for a coke oven battery, a riserhaving a connecting pipe joining said main, the connecting pipe beingshaped to form a pocket adjacent said main in which liquid may collect,means to supply liquid to said pocket, said pocket being provided withan opening from the upper part of said pocke into said zniain for theadmission of gas or the overflow of liquid, a partition extending fromthe top of said pocket to a distance below said opening to form a liquidseal closure when liquid has collected in said pocket to overflowthrough said opening and means for draining at will said liquid fromsaid pocket into said main to open said liquid seal closure.

4. Gas ofltake apparatus which comprises, a main for a coke ovenbattery, a riser having a connecting pipe joining said main, theconnecting pipe being shaped to form a pocket adjacent said main inwhich liquid may collect, means to supply liquid to said pocket, saidpocket being provided with an opening extending from the upper part ofsaid pocket into said main for the admission of gas or the overflow ofliquid, a partition extending from the top of said pocket toa distancebelow said opening so as to maintain a liquid seal closure when liquidhas collected in said pocket to overflow through said opening, saidpocket being also provided with a drain opening extending from the lowerpart of said pocket into said main, and a valve for closing saidopening.

5. A cut-oif for distillation gases from a riser to the collecting mainof a coke oven battery comprising, a casing having a lower end wall withan opening in its upper portion registering with an opening in the mainand having a portion closing the upper part of said casing at a pointspaced from said opening in said casing and projecting down wardly to :alevel below the bottom of said opening in said casing so as to maintaina liquid seal which prevents'the passage of gas through said casing, andmeans for draining the liquid from said casing to break said liquidseal.

6. A gas oflt-ake apparatus for conveying d stillation gases from acarbonizatiou-chamher to .a collecting main comprising, a pipecommunicably connecting the carbon-ization chamber with said collectormain for flow of gas from the carbonization chamber through said pipeinto said collector main, means for introducing iquid into said pipe, amember in said pipe extending into the liquid so as to maintain a liquidseal for preventing the passage of gas through said pipe and means fordraining the liquid from said pipe to permit flow of gas therethroughinto the collector main.

7. A gas oflitake apparatus for conveying distillation gases fromacarbonization chameeaeve pipe, receiving at its lower end the gases, adischarge pipe extending downwardly from the top of said riser pipe intosaid collector main and being shaped to form a pocket adj acent saidmain in which liquid may collect, a spray in said discharge pipe forspraying liquid into said pocket, said pocket being provided with anopening extending into the upper portion thereof and leading into saidcollector main for the admission of gas into said collector main or theoverflow of liquid

